When using values in condition cells for attributes of any data type except Boolean, the values do not need to be discreet. They can be in the form of a range. A value range is typically expressed in the following format: x..y, where x and y are the starting and ending values for the range inclusive of the endpoints if there is no other notation to indicate otherwise, as illustrated:

Figure 1. Rulesheet using value ranges in the column cells of a condition row

In this example, a maxCargoWeight value is assigned to each Aircraft depending on the flightNumber value from the FlightPlan that Aircraft is associated with. The value range 101..200 represents all values (integers in this case) between 101 and 200, including the range endpoints 101 and 200. This is an inclusive range; the starting and ending values are included in the range.

Corticon Studio also gives you the option of defining value ranges where one or both of the endpoints are not inclusive, meaning that they are not included in the range of values. This is the same idea as the difference between greater than and greater than or equal to. The following figure shows the same Rulesheet as in the previous figure, but with one difference: the value range was changed from 201..300 to (200..300]. The starting parenthesis ( indicates that the starting value for the range, 200, is exclusive; it is not included in the range. The ending bracket ] indicates that the ending value is inclusive. Because flightNumber is an integer value, and therefore there are no fractional values allowed, so 201..300 and (200..300] are equivalent.

Figure 2. Rulesheet using open-ended value ranges in condition cells

All of the possible combinations of parenthesis and bracket notation for value ranges and their meanings are:

Figure 3. Rulesheet using open-ended value ranges in condition cells

If a value range has no enclosing parentheses or brackets, it is assumed to be inclusive. It is therefore not necessary to use the [..]notation for a closed range in Corticon Studio. However, should either end of a value range have a parenthesis or a bracket, then the other end must also have a parenthesis or a bracket. For example, x..y) is not allowed, and is properly expressed as [x..y).

Value ranges can also be used in the Filters section of the Rulesheet. See the Ranges and lists in conditions and filters for details about usage.